Top portion of a housing for a surgical lighthead



FIG. 1 is a perspective view of a top portion of a housing for a surgical lighthead showing my new ornamental design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is a front elevational view thereof.

The parts shown in broken lines in FIGS. 1-6 are shown for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a top portion of a housing for a surgical lighthead, as shown and described. 